| State of Iowa |
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| Total population | 2,926,324 | Rank: | 30th | |
| Percent of people in same-sex couples | 0.25% | Rank: | 50th | |
| Total same-sex couples | 3,698 | Rank: | 36th | |
| Percent of male couples | 0.26% | Rank: | 50th | |
| Percent of female couples | 0.28% | Rank: | 50th | |
| By county | By tract | By zip code | By state MSA | |
| By Incorporated place | Maps | |||